This is a paid asset, but now you can download Sharp Shadows Toolkit Free.
Detail this asset from Unity Store: Original Link
Sharp Shadows Toolkit v1.1.1 (Latest version)
Sharp Shadows Toolkit v1.03
Important note on URP 7.2 and up: Unity changed the way shadows are handled in Universal Render Pipeline (URP) version 7.2 and up and as a result, the “Inject Into Screen Space Shadow Resolve Texture” render mode no longer works in these versions. The “Multiply Scene After Opaque” is unaffected by the changes and works properly, but is more suited to art styles where shadows are pitch black.
The Sharp Shadows Toolkit brings sharp, pixel-perfect shadows to your Lightweight/Universal Render Pipeline project. Many games and experiences target a non-photo-realistic art style for which sharp shadows are better suited than the built-in shadows that tend to be either too soft or too jagged, especially on low quality settings.
The toolkit can be useful in a wide variety of scenarios, from a single accurate drop-shadow for the main character in a mobile game to ubiquitous high quality shadows for an architecture visualization project.
Website & Readme
Features
– Dynamic pixel-perfect shadows for the Lightweight/Universal Render Pipeline
– No jagged shadow edges or visible pixels
– Seamless editor integration using automatic asset post processing
– Two rendering modes
— Inject into screen space shadow texture for optimal image quality
— Draw after opaque geometry for optimal performance
– Handles both skinned and non-skinned meshes
– No restriction on the mesh geometry of the shadow caster
– Multi-object editing
– Fog support
Current Limitations
– For the Lightweight/Universal Render Pipeline only
– Only supports the main directional light of the scene
– No support for custom vertex displacement
– Alpha blended or clipped geometry will produce solid shadows (the shape of the triangles)
– Skinned mesh shadows may appear cracked if they are subject to large deformations
– Shadows are not anti-aliased when injected into screen space shadow texture
Requirements
– Unity 2019.1 or above (tested with 2019.1.10f1, 2019.2.3f1, 2019.3.0b2, 2019.3.5f1)
– Lightweight/Universal Render Pipeline 5.7.2 or above (tested with 5.7.2, 6.9.1, 7.0.1, 7.1.8)
– A target platform with stencil buffer support